selftests/xsk: do not close unused file descriptors
Do not close descriptors that have never been used. File descriptor fields that are not in use are erroneously marked with the number 0, which is a valid fd. Mark unused fds with -1 instead and do not close these when deleting the socket. Signed-off-by:Magnus Karlsson <magnus.karlsson@intel.com> Acked-by:
Maciej Fijalkowski <maciej.fijalkowski@intel.com> Link: https://lore.kernel.org/r/20230111093526.11682-3-magnus.karlsson@gmail.comSigned-off-by:
Alexei Starovoitov <ast@kernel.org>
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